Originally Posted by
abmj-jr
If flying both in and out via NRT, I'd prefer going to Kansai first and working my way back to Tokyo. That is just personal preference. It will actually work just fine either way.
+1 for me... Travel to the further end first and make your way back up...
The excitement of the upcoming sights will sustain you through the long train journey because you work your way back to Tokyo.